基于MIDAS的预应力混凝土简支T梁桥加固设计

Reinforcement Design of Prestressed Concrete Simply Supported T-beam Bridge Based on MIDAS

为研究预应力简支T型梁桥的体外预应力加固设计可行性,基于MIDAS有限元分析软件建立模型,对加固前后梁结构的承载力与使用性能进行分析与验算.研究结果表明:采用预应力碳纤维板法进行加固,能有效提高梁体自身的承载能力,满足桥梁设计荷载等级的强度要求.采用预应力碳纤维板法加固技术,起到提升桥梁的抗弯承载力、增加刚度、减少原有桥梁裂缝宽度及改善耐久性的作用.

In order to study the feasibility of externally prestressed reinforcement design of prestressed simply supported T-beam bridges,a model is established based on the MIDAS finite element analysis software to analyze and verify the bearing capacity and service performance of the beam structure before and after reinforcement.The research results show that the reinforcement with the prestressed carbon fiber board method can effectively improve the bearing capacity of the beam and meet the strength requirements of the design load level of the bridge.The use of prestressed carbon fiber board reinforcement technology has played a role in improving the flexural capacity,stiffness,crack width and durability of the bridge.